Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues
Net earned premiums	$ 1,800	$ 1,668	$ 3,564	$ 3,317
Net investment income	578	470	1,211	1,118
Net realized investment gains (losses):
Other-than-temporary impairment losses	(16)	(12)	(34)	(27)
Portion of other-than-temporary impairments recognized in Other comprehensive income (loss)		(11)		(23)
Net other-than-temporary impairment losses recognized in earnings	(16)	(23)	(34)	(50)
Other net realized investment gains (losses)	2	45	48	108
Net realized investment gains (losses)	(14)	22	14	58
Other revenues	129	86	207	154
Total revenues	2,493	2,246	4,996	4,647
Claims, Benefits and Expenses
Insurance claims and policyholders’ benefits	1,521	1,348	2,950	2,729
Amortization of deferred acquisition costs	335	309	663	604
Other operating expenses	320	316	661	635
Interest	41	43	83	85
Total claims, benefits and expenses	2,217	2,016	4,357	4,053
Income (loss) before income tax	276	230	639	594
Income tax (expense) benefit	(82)	(64)	(195)	(178)
Net income (loss)	$ 194	$ 166	$ 444	$ 416
Basic earnings (loss) per share	$ 0.72	$ 0.62	$ 1.65	$ 1.55
Diluted earnings (loss) per share	$ 0.72	$ 0.62	$ 1.64	$ 1.54
Dividends per share	$ 0.20	$ 0.15	$ 0.40	$ 0.30
Weighted Average Outstanding Common Stock and Common Stock Equivalents
Basic	269.7	269.4	269.6	269.4
Diluted	270.1	269.8	270.0	269.7